Acetic acid is a normal component of food items (vinegar is a food item). Simple Green, on the other hand, while far less “nasty” than many cleaning agents, up until 2013 contained 4% 2-butoxyethanol (EGBE). This was eventually removed due to concerns over toxicity (nastiness), but current formulation still contains lovely non-food ingredients such as Tetrasodium N,N-bis(carboxymethyl)-L-glutamate and Isothiazolinone mixture.